Thread construction for rotary worm compression-expansion machin

Details Thread construction for rotary worm compression-expansion machin Thread construction for rotary worm compression-expansion machin

1977-11-04

1979-12-18

Vrablik, John J.

Rotary expansible chamber devices

Interengaging rotating members

Non-parallel axis

F01C 108, F04C 1704

Patent

active

041792505

ABSTRACT:
A rotary worm fluid working machine in which a casing enclosed rotor, cooperable with one or more rotary pinions, is provided with a plurality of spiral thread grooves each having convergent side surfaces so that teeth on the pinion wheel enter the thread grooves with a clearance diminishing to contact prior to tooth exit. The clearance reduces shock loading on the pinion wheel and reduces pinion wheel tooth seal wear in conical worm machines due to relatively lower rotor-pinion wheel tooth velocities in the region of tooth seal-rotor contact.

REFERENCES:
patent: 3841806 (1974-10-01), Zimmern
patent: 3905731 (1975-09-01), Zimmern

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